Liquid crystal display

Abstract

A liquid crystal display device according to an embodiment is disclosed. The liquid crystal display device includes a liquid crystal display panel; a light emitting diode (LED) substrate; a plurality of light emitting diodes (LEDs) disposed on the LED substrate; a first diffuser disposed between the plurality of LEDs and the liquid crystal display panel; a bandpass filter being disposed between the plurality of LEDs and the diffuser; and a plurality of focus lenses corresponding to the plurality of LEDs, wherein each of the LEDs includes one of the plurality of focus lenses.

What is claimed is: 
     
       1. A liquid crystal display device, comprising:
 a liquid crystal display panel; 
 a light emitting diode (LED) substrate; 
 a plurality of light emitting diodes (LEDs) disposed on the LED substrate; 
 a first diffuser disposed between the plurality of LEDs and the liquid crystal display panel; 
 a bandpass filter disposed between the plurality of LEDs and the first diffuser; 
 a plurality of focus lenses corresponding to the plurality of LEDs and disposed between the plurality of LEDs and the bandpass filter; 
 a holder disposed between the plurality of LEDs and the first diffuser; and 
 a reflective sheet disposed between the holder and the first diffuser, 
 wherein each of the LEDs includes one of the plurality of focus lenses, 
 the holder includes a plurality of holes aligned with the plurality of LEDs, and 
 the bandpass filter is disposed in the plurality of holes. 
 
     
     
       2. The liquid crystal display device according to  claim 1 , further comprising a second diffuser disposed between the holder and the first diffuser, and the reflective sheet being disposed between the second diffuser and the first diffuser, wherein the bandpass filter includes a plurality of bandpass filter portions, each of the plurality of bandpass filter portions being disposed in each of the plurality of holes. 
     
     
       3. The liquid crystal display device according to  claim 1 , further comprising a plurality of diffuser portions disposed between the holder and the first diffuser, and the bandpass filter including a plurality of bandpass filter portions wherein each of the plurality of bandpass filter portions is disposed in each of the plurality of holes, and each of the plurality of diffuser portions is disposed on each of the plurality of the bandpass filter portions. 
     
     
       4. The liquid crystal display device according to  claim 1 , wherein the LED substrate is reflective. 
     
     
       5. The liquid crystal display device according to  claim 1 , wherein the LED substrate is light absorbent. 
     
     
       6. A liquid crystal display device, comprising:
 a liquid crystal display panel including a thin film transistor (TFT) substrate and a color filter substrate, with a liquid crystal layer disposed therebetween; 
 a backlight including a light emitting diode (LED) substrate having a plurality of light emitting diodes (LEDs) disposed thereon; 
 a plurality of focus lenses corresponding to the plurality of LEDs, each of the plurality of LEDs disposed in corresponding one of the plurality of focus lenses; 
 a bandpass filter that sharpens a spectrum of light emitted from one of the plurality of the LEDs through one of the plurality of focus lenses, the bandpass filter being disposed between the plurality of LEDs and the liquid crystal display panel; and 
 a holder having a plurality of holes, the plurality of holes being aligned with the plurality of LEDs, 
 wherein the bandpass filter includes a plurality of bandpass filter portions, the plurality of bandpass filter portions overlapping with the plurality of LEDs and being disposed in the plurality of holes. 
 
     
     
       7. The liquid crystal display device according to  claim 6 , wherein the bandpass filter includes a modified surface portion on a surface facing toward the liquid crystal display panel, the modified surface portion configured to diffuse light passing therethrough. 
     
     
       8. A liquid crystal display device, comprising:
 a liquid crystal display panel; 
 a light emitting diode (LED) substrate; 
 a plurality of light emitting diodes (LEDs) disposed on the LED substrate; 
 a first diffuser disposed between the plurality of LEDs and the liquid crystal display panel; 
 a bandpass filter disposed between the plurality of LEDs and the first diffuser; 
 a plurality of focus lenses corresponding to the plurality of LEDs and disposed between the plurality of LEDs and the bandpass filter; 
 a holder disposed between the plurality of LEDs and the first diffuser; and 
 a reflective sheet disposed between the holder and the first diffuser, 
 wherein each of the LEDs includes one of the plurality of focus lenses, 
 the bandpass filter includes a plurality of bandpass filter portions, 
 the holder includes a plurality of holes aligned with the plurality of LEDs, 
 each of the plurality of bandpass filter portions is disposed within each of the plurality of holes, and 
 each of the plurality of bandpass filter portions includes a modified surface portion on a side disposed relatively nearer to the first diffuser. 
 
     
     
       9. The liquid crystal display device according to  claim 8 , wherein the modified surface portion includes an embossed pattern.